vnet/vnet/interface.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 /*
  16  * interface.c: VNET interfaces/sub-interfaces
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include <vnet/vnet.h>
  41 #include <vnet/plugin/plugin.h>
  42 #include <vnet/fib/ip6_fib.h>
  43 #include <vnet/adj/adj.h>
  44
  45 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
  46 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
  47
  48 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  49                                                          u32 hw_if_index,
  50                                                          u32 flags,
  51                                                          u32 helper_flags);
  52
  53 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  54                                                          u32 sw_if_index,
  55                                                          u32 flags,
  56                                                          u32 helper_flags);
  57
  58 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  59                                                          u32 hw_if_index,
  60                                                          u32 hw_class_index,
  61                                                          u32 redistribute);
  62
  63 typedef struct
  64 {
  65   /* Either sw or hw interface index. */
  66   u32 sw_hw_if_index;
  67
  68   /* Flags. */
  69   u32 flags;
  70 } vnet_sw_hw_interface_state_t;
  71
  72 static void
  73 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  74 {
  75   vnet_sw_hw_interface_state_t *s =
  76     va_arg (*va, vnet_sw_hw_interface_state_t *);
  77   u32 n = va_arg (*va, u32);
  78   u32 i;
  79   for (i = 0; i < n; i++)
  80     {
  81       serialize_integer (m, s[i].sw_hw_if_index,
  82                          sizeof (s[i].sw_hw_if_index));
  83       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  84     }
  85 }
  86
  87 static void
  88 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  89                                             va_list * va)
  90 {
  91   vnet_sw_hw_interface_state_t *s =
  92     va_arg (*va, vnet_sw_hw_interface_state_t *);
  93   u32 n = va_arg (*va, u32);
  94   u32 i;
  95   for (i = 0; i < n; i++)
  96     {
  97       unserialize_integer (m, &s[i].sw_hw_if_index,
  98                            sizeof (s[i].sw_hw_if_index));
  99       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 100     }
 101 }
 102
 103 static void
 104 serialize_vnet_sw_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 105 {
 106   vnet_sw_hw_interface_state_t *s =
 107     va_arg (*va, vnet_sw_hw_interface_state_t *);
 108   serialize (m, serialize_vec_vnet_sw_hw_interface_state, s, 1);
 109 }
 110
 111 static void
 112 unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va)
 113 {
 114   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 115   vnet_sw_hw_interface_state_t s;
 116
 117   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 118
 119   vnet_sw_interface_set_flags_helper
 120     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 121      /* helper_flags no redistribution */ 0);
 122 }
 123
 124 static void
 125 unserialize_vnet_hw_interface_set_flags (serialize_main_t * m, va_list * va)
 126 {
 127   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 128   vnet_sw_hw_interface_state_t s;
 129
 130   unserialize (m, unserialize_vec_vnet_sw_hw_interface_state, &s, 1);
 131
 132   vnet_hw_interface_set_flags_helper
 133     (vnet_get_main (), s.sw_hw_if_index, s.flags,
 134      /* helper_flags no redistribution */ 0);
 135 }
 136
 137 MC_SERIALIZE_MSG (vnet_sw_interface_set_flags_msg, static) =
 138 {
 139 .name = "vnet_sw_interface_set_flags",.serialize =
 140     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 141     unserialize_vnet_sw_interface_set_flags,};
 142
 143 MC_SERIALIZE_MSG (vnet_hw_interface_set_flags_msg, static) =
 144 {
 145 .name = "vnet_hw_interface_set_flags",.serialize =
 146     serialize_vnet_sw_hw_interface_set_flags,.unserialize =
 147     unserialize_vnet_hw_interface_set_flags,};
 148
 149 void
 150 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 151 {
 152   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 153   vnet_sw_hw_interface_state_t *sts = 0, *st;
 154   vnet_sw_interface_t *sif;
 155   vnet_hw_interface_t *hif;
 156   vnet_interface_main_t *im = &vnm->interface_main;
 157
 158   /* Serialize hardware interface classes since they may have changed.
 159      Must do this before sending up/down flags. */
 160   /* *INDENT-OFF* */
 161   pool_foreach (hif, im->hw_interfaces, ({
 162     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 163     serialize_cstring (m, hw_class->name);
 164   }));
 165   /* *INDENT-ON* */
 166
 167   /* Send sw/hw interface state when non-zero. */
 168   /* *INDENT-OFF* */
 169   pool_foreach (sif, im->sw_interfaces, ({
 170     if (sif->flags != 0)
 171       {
 172         vec_add2 (sts, st, 1);
 173         st->sw_hw_if_index = sif->sw_if_index;
 174         st->flags = sif->flags;
 175       }
 176   }));
 177   /* *INDENT-ON* */
 178
 179   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 180
 181   if (sts)
 182     _vec_len (sts) = 0;
 183
 184   /* *INDENT-OFF* */
 185   pool_foreach (hif, im->hw_interfaces, ({
 186     if (hif->flags != 0)
 187       {
 188         vec_add2 (sts, st, 1);
 189         st->sw_hw_if_index = hif->hw_if_index;
 190         st->flags = hif->flags;
 191       }
 192   }));
 193   /* *INDENT-ON* */
 194
 195   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 196
 197   vec_free (sts);
 198 }
 199
 200 void
 201 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 202 {
 203   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 204   vnet_sw_hw_interface_state_t *sts = 0, *st;
 205
 206   /* First set interface hardware class. */
 207   {
 208     vnet_interface_main_t *im = &vnm->interface_main;
 209     vnet_hw_interface_t *hif;
 210     char *class_name;
 211     uword *p;
 212     clib_error_t *error;
 213
 214     /* *INDENT-OFF* */
 215     pool_foreach (hif, im->hw_interfaces, ({
 216       unserialize_cstring (m, &class_name);
 217       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 218       ASSERT (p != 0);
 219       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 220       if (error)
 221         clib_error_report (error);
 222       vec_free (class_name);
 223     }));
 224     /* *INDENT-ON* */
 225   }
 226
 227   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 228   vec_foreach (st, sts)
 229     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 230                                         /* no distribute */ 0);
 231   vec_free (sts);
 232
 233   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 234   vec_foreach (st, sts)
 235     vnet_hw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 236                                         /* no distribute */ 0);
 237   vec_free (sts);
 238 }
 239
 240 static clib_error_t *
 241 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 242                                       u32 flags,
 243                                       _vnet_interface_function_list_elt_t *
 244                                       elt)
 245 {
 246   clib_error_t *error = 0;
 247
 248   while (elt)
 249     {
 250       error = elt->fp (vnm, if_index, flags);
 251       if (error)
 252         return error;
 253       elt = elt->next_interface_function;
 254     }
 255   return error;
 256 }
 257
 258 static clib_error_t *
 259 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 260                                      u32 is_create)
 261 {
 262   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 263   vnet_hw_interface_class_t *hw_class =
 264     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 265   vnet_device_class_t *dev_class =
 266     vnet_get_device_class (vnm, hi->dev_class_index);
 267   clib_error_t *error = 0;
 268
 269   if (hw_class->interface_add_del_function
 270       && (error =
 271           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 272     return error;
 273
 274   if (dev_class->interface_add_del_function
 275       && (error =
 276           dev_class->interface_add_del_function (vnm, hw_if_index,
 277                                                  is_create)))
 278     return error;
 279
 280   error = call_elf_section_interface_callbacks
 281     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 282
 283   return error;
 284 }
 285
 286 static clib_error_t *
 287 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 288                                      u32 is_create)
 289 {
 290   return call_elf_section_interface_callbacks
 291     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 292 }
 293
 294 #define VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE (1 << 0)
 295 #define VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE (1 << 1)
 296
 297 static clib_error_t *
 298 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 299                                     u32 flags, u32 helper_flags)
 300 {
 301   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 302   vnet_hw_interface_class_t *hw_class =
 303     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 304   vnet_device_class_t *dev_class =
 305     vnet_get_device_class (vnm, hi->dev_class_index);
 306   vlib_main_t *vm = vnm->vlib_main;
 307   u32 mask;
 308   clib_error_t *error = 0;
 309   u32 is_create =
 310     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 311
 312   mask =
 313     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK |
 314      VNET_HW_INTERFACE_FLAG_SPEED_MASK);
 315   flags &= mask;
 316
 317   /* Call hardware interface add/del callbacks. */
 318   if (is_create)
 319     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 320
 321   /* Already in the desired state? */
 322   if (!is_create && (hi->flags & mask) == flags)
 323     goto done;
 324
 325   /* Some interface classes do not redistribute (e.g. are local). */
 326   if (!dev_class->redistribute)
 327     helper_flags &= ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 328
 329   if (vm->mc_main
 330       && (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 331     {
 332       vnet_sw_hw_interface_state_t s;
 333       s.sw_hw_if_index = hw_if_index;
 334       s.flags = flags;
 335       mc_serialize (vm->mc_main, &vnet_hw_interface_set_flags_msg, &s);
 336     }
 337
 338   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 339       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 340     {
 341       /* Do hardware class (e.g. ethernet). */
 342       if (hw_class->link_up_down_function
 343           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 344                                                        flags)))
 345         goto done;
 346
 347       error = call_elf_section_interface_callbacks
 348         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 349
 350       if (error)
 351         goto done;
 352     }
 353
 354   hi->flags &= ~mask;
 355   hi->flags |= flags;
 356
 357 done:
 358   return error;
 359 }
 360
 361 static clib_error_t *
 362 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 363                                     u32 flags, u32 helper_flags)
 364 {
 365   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 366   vlib_main_t *vm = vnm->vlib_main;
 367   u32 mask;
 368   clib_error_t *error = 0;
 369   u32 is_create =
 370     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 371   u32 old_flags;
 372
 373   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 374   flags &= mask;
 375
 376   if (is_create)
 377     {
 378       error =
 379         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 380       if (error)
 381         goto done;
 382
 383       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 384         {
 385           /* Notify everyone when the interface is created as admin up */
 386           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 387                                                         flags,
 388                                                         vnm->
 389                                                         sw_interface_admin_up_down_functions);
 390           if (error)
 391             goto done;
 392         }
 393     }
 394   else
 395     {
 396       vnet_sw_interface_t *si_sup = si;
 397
 398       /* Check that super interface is in correct state. */
 399       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 400         {
 401           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 402
 403           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 404           if ((flags != (si_sup->flags & mask)) &&
 405               (!((flags == 0)
 406                  && ((si_sup->flags & mask) ==
 407                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 408             {
 409               error = clib_error_return (0, "super-interface %U must be %U",
 410                                          format_vnet_sw_interface_name, vnm,
 411                                          si_sup,
 412                                          format_vnet_sw_interface_flags,
 413                                          flags);
 414               goto done;
 415             }
 416         }
 417
 418       /* Donot change state for slave link of bonded interfaces */
 419       if (si->flags & VNET_SW_INTERFACE_FLAG_BOND_SLAVE)
 420         {
 421           error = clib_error_return
 422             (0, "not allowed as %U belong to a BondEthernet interface",
 423              format_vnet_sw_interface_name, vnm, si);
 424           goto done;
 425         }
 426
 427       /* Already in the desired state? */
 428       if ((si->flags & mask) == flags)
 429         goto done;
 430
 431       /* Sub-interfaces of hardware interfaces that do no redistribute,
 432          do not redistribute themselves. */
 433       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 434         {
 435           vnet_hw_interface_t *hi =
 436             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 437           vnet_device_class_t *dev_class =
 438             vnet_get_device_class (vnm, hi->dev_class_index);
 439           if (!dev_class->redistribute)
 440             helper_flags &=
 441               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 442         }
 443
 444       if (vm->mc_main
 445           && (helper_flags &
 446               VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE))
 447         {
 448           vnet_sw_hw_interface_state_t s;
 449           s.sw_hw_if_index = sw_if_index;
 450           s.flags = flags;
 451           mc_serialize (vm->mc_main, &vnet_sw_interface_set_flags_msg, &s);
 452         }
 453
 454       /* set the flags now before invoking the registered clients
 455        * so that the state they query is consistent with the state here notified */
 456       old_flags = si->flags;
 457       si->flags &= ~mask;
 458       si->flags |= flags;
 459       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 460         error = call_elf_section_interface_callbacks
 461           (vnm, sw_if_index, flags,
 462            vnm->sw_interface_admin_up_down_functions);
 463       si->flags = old_flags;
 464
 465       if (error)
 466         goto done;
 467
 468       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 469         {
 470           vnet_hw_interface_t *hi =
 471             vnet_get_hw_interface (vnm, si->hw_if_index);
 472           vnet_hw_interface_class_t *hw_class =
 473             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 474           vnet_device_class_t *dev_class =
 475             vnet_get_device_class (vnm, hi->dev_class_index);
 476
 477           /* save the si admin up flag */
 478           old_flags = si->flags;
 479
 480           /* update si admin up flag in advance if we are going admin down */
 481           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 482             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 483
 484           if (dev_class->admin_up_down_function
 485               && (error = dev_class->admin_up_down_function (vnm,
 486                                                              si->hw_if_index,
 487                                                              flags)))
 488             {
 489               /* restore si admin up flag to it's original state on errors */
 490               si->flags = old_flags;
 491               goto done;
 492             }
 493
 494           if (hw_class->admin_up_down_function
 495               && (error = hw_class->admin_up_down_function (vnm,
 496                                                             si->hw_if_index,
 497                                                             flags)))
 498             {
 499               /* restore si admin up flag to it's original state on errors */
 500               si->flags = old_flags;
 501               goto done;
 502             }
 503
 504           /* Admin down implies link down. */
 505           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 506               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 507             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 508                                                 hi->flags &
 509                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 510                                                 helper_flags);
 511         }
 512     }
 513
 514   si->flags &= ~mask;
 515   si->flags |= flags;
 516
 517 done:
 518   return error;
 519 }
 520
 521 clib_error_t *
 522 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
 523 {
 524   return vnet_hw_interface_set_flags_helper
 525     (vnm, hw_if_index, flags,
 526      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 527 }
 528
 529 clib_error_t *
 530 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
 531 {
 532   return vnet_sw_interface_set_flags_helper
 533     (vnm, sw_if_index, flags,
 534      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 535 }
 536
 537 static u32
 538 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 539                                        vnet_sw_interface_t * template)
 540 {
 541   vnet_interface_main_t *im = &vnm->interface_main;
 542   vnet_sw_interface_t *sw;
 543   u32 sw_if_index;
 544
 545   pool_get (im->sw_interfaces, sw);
 546   sw_if_index = sw - im->sw_interfaces;
 547
 548   sw[0] = template[0];
 549
 550   sw->flags = 0;
 551   sw->sw_if_index = sw_if_index;
 552   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 553     sw->sup_sw_if_index = sw->sw_if_index;
 554
 555   /* Allocate counters for this interface. */
 556   {
 557     u32 i;
 558
 559     vnet_interface_counter_lock (im);
 560
 561     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 562       {
 563         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 564         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 565       }
 566
 567     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 568       {
 569         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 570                                         sw_if_index);
 571         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 572                                     sw_if_index);
 573       }
 574
 575     vnet_interface_counter_unlock (im);
 576   }
 577
 578   return sw_if_index;
 579 }
 580
 581 clib_error_t *
 582 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 583                           u32 * sw_if_index)
 584 {
 585   clib_error_t *error;
 586   vnet_hw_interface_t *hi;
 587   vnet_device_class_t *dev_class;
 588
 589   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 590   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 591
 592   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 593       dev_class->subif_add_del_function)
 594     {
 595       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 596                                                  (struct vnet_sw_interface_t
 597                                                   *) template, 1);
 598       if (error)
 599         return error;
 600     }
 601
 602   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 603   error = vnet_sw_interface_set_flags_helper
 604     (vnm, *sw_if_index, template->flags,
 605      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 606
 607   if (error)
 608     {
 609       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 610       vnet_interface_main_t *im = &vnm->interface_main;
 611       vnet_sw_interface_t *sw =
 612         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 613       pool_put (im->sw_interfaces, sw);
 614     }
 615
 616   return error;
 617 }
 618
 619 void
 620 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 621 {
 622   vnet_interface_main_t *im = &vnm->interface_main;
 623   vnet_sw_interface_t *sw =
 624     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 625
 626   /* Make sure the interface is in L3 mode (removed from L2 BD or XConnect) */
 627   vlib_main_t *vm = vlib_get_main ();
 628   l2_input_config_t *config;
 629   config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 630   if (config->xconnect)
 631     set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0, 0, 0,
 632                      0);
 633   if (config->xconnect || config->bridge)
 634     set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
 635
 636   /* Bring down interface in case it is up. */
 637   if (sw->flags != 0)
 638     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 639
 640   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 641
 642   pool_put (im->sw_interfaces, sw);
 643 }
 644
 645 static void
 646 setup_tx_node (vlib_main_t * vm,
 647                u32 node_index, vnet_device_class_t * dev_class)
 648 {
 649   vlib_node_t *n = vlib_get_node (vm, node_index);
 650
 651   n->function = dev_class->tx_function;
 652   n->format_trace = dev_class->format_tx_trace;
 653
 654   vlib_register_errors (vm, node_index,
 655                         dev_class->tx_function_n_errors,
 656                         dev_class->tx_function_error_strings);
 657 }
 658
 659 static void
 660 setup_output_node (vlib_main_t * vm,
 661                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 662 {
 663   vlib_node_t *n = vlib_get_node (vm, node_index);
 664   n->format_buffer = hw_class->format_header;
 665   n->unformat_buffer = hw_class->unformat_header;
 666 }
 667
 668 /* Register an interface instance. */
 669 u32
 670 vnet_register_interface (vnet_main_t * vnm,
 671                          u32 dev_class_index,
 672                          u32 dev_instance,
 673                          u32 hw_class_index, u32 hw_instance)
 674 {
 675   vnet_interface_main_t *im = &vnm->interface_main;
 676   vnet_hw_interface_t *hw;
 677   vnet_device_class_t *dev_class =
 678     vnet_get_device_class (vnm, dev_class_index);
 679   vnet_hw_interface_class_t *hw_class =
 680     vnet_get_hw_interface_class (vnm, hw_class_index);
 681   vlib_main_t *vm = vnm->vlib_main;
 682   u32 hw_index;
 683   char *tx_node_name, *output_node_name;
 684
 685   pool_get (im->hw_interfaces, hw);
 686
 687   hw_index = hw - im->hw_interfaces;
 688   hw->hw_if_index = hw_index;
 689
 690   if (dev_class->format_device_name)
 691     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 692   else if (hw_class->format_interface_name)
 693     hw->name = format (0, "%U", hw_class->format_interface_name,
 694                        dev_instance);
 695   else
 696     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 697
 698   if (!im->hw_interface_by_name)
 699     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 700                                                 sizeof (hw->name[0]),
 701                                                 sizeof (uword));
 702
 703   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 704
 705   /* Make hardware interface point to software interface. */
 706   {
 707     vnet_sw_interface_t sw;
 708
 709     memset (&sw, 0, sizeof (sw));
 710     sw.type = VNET_SW_INTERFACE_TYPE_HARDWARE;
 711     sw.hw_if_index = hw_index;
 712     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 713   }
 714
 715   hw->dev_class_index = dev_class_index;
 716   hw->dev_instance = dev_instance;
 717   hw->hw_class_index = hw_class_index;
 718   hw->hw_instance = hw_instance;
 719
 720   hw->max_rate_bits_per_sec = 0;
 721   hw->min_packet_bytes = 0;
 722   hw->per_packet_overhead_bytes = 0;
 723   hw->max_l3_packet_bytes[VLIB_RX] = ~0;
 724   hw->max_l3_packet_bytes[VLIB_TX] = ~0;
 725
 726   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 727   output_node_name = (char *) format (0, "%v-output", hw->name);
 728
 729   /* If we have previously deleted interface nodes, re-use them. */
 730   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 731     {
 732       vnet_hw_interface_nodes_t *hn;
 733       vnet_interface_output_runtime_t *rt;
 734       vlib_node_t *node;
 735       vlib_node_runtime_t *nrt;
 736
 737       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 738
 739       hw->tx_node_index = hn->tx_node_index;
 740       hw->output_node_index = hn->output_node_index;
 741
 742       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 743       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 744
 745       rt = vlib_node_get_runtime_data (vm, hw->output_node_index);
 746       ASSERT (rt->is_deleted == 1);
 747       rt->is_deleted = 0;
 748       rt->hw_if_index = hw_index;
 749       rt->sw_if_index = hw->sw_if_index;
 750       rt->dev_instance = hw->dev_instance;
 751
 752       rt = vlib_node_get_runtime_data (vm, hw->tx_node_index);
 753       rt->hw_if_index = hw_index;
 754       rt->sw_if_index = hw->sw_if_index;
 755       rt->dev_instance = hw->dev_instance;
 756
 757       /* The new class may differ from the old one.
 758        * Functions have to be updated. */
 759       node = vlib_get_node (vm, hw->output_node_index);
 760       node->function = dev_class->no_flatten_output_chains ?
 761         vnet_interface_output_node_no_flatten_multiarch_select () :
 762         vnet_interface_output_node_multiarch_select ();
 763       node->format_trace = format_vnet_interface_output_trace;
 764       nrt = vlib_node_get_runtime (vm, hw->output_node_index);
 765       nrt->function = node->function;
 766
 767       node = vlib_get_node (vm, hw->tx_node_index);
 768       node->function = dev_class->tx_function;
 769       node->format_trace = dev_class->format_tx_trace;
 770       nrt = vlib_node_get_runtime (vm, hw->tx_node_index);
 771       nrt->function = node->function;
 772
 773       vlib_worker_thread_node_runtime_update ();
 774       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 775     }
 776   else
 777     {
 778       vlib_node_registration_t r;
 779       vnet_interface_output_runtime_t rt = {
 780         .hw_if_index = hw_index,
 781         .sw_if_index = hw->sw_if_index,
 782         .dev_instance = hw->dev_instance,
 783         .is_deleted = 0,
 784       };
 785
 786       memset (&r, 0, sizeof (r));
 787       r.type = VLIB_NODE_TYPE_INTERNAL;
 788       r.runtime_data = &rt;
 789       r.runtime_data_bytes = sizeof (rt);
 790       r.scalar_size = 0;
 791       r.vector_size = sizeof (u32);
 792
 793       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 794       r.name = tx_node_name;
 795       r.function = dev_class->tx_function;
 796
 797       hw->tx_node_index = vlib_register_node (vm, &r);
 798
 799       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 800                                           "error-drop",
 801                                           VNET_INTERFACE_TX_NEXT_DROP);
 802
 803       r.flags = 0;
 804       r.name = output_node_name;
 805       r.function = dev_class->no_flatten_output_chains ?
 806         vnet_interface_output_node_no_flatten_multiarch_select () :
 807         vnet_interface_output_node_multiarch_select ();
 808       r.format_trace = format_vnet_interface_output_trace;
 809
 810       {
 811         static char *e[] = {
 812           "interface is down",
 813           "interface is deleted",
 814         };
 815
 816         r.n_errors = ARRAY_LEN (e);
 817         r.error_strings = e;
 818       }
 819       hw->output_node_index = vlib_register_node (vm, &r);
 820
 821 #define _(sym,str) vlib_node_add_named_next_with_slot (vm, \
 822                      hw->output_node_index, str,           \
 823                      VNET_INTERFACE_OUTPUT_NEXT_##sym);
 824       foreach_intf_output_feat
 825 #undef _
 826         vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 827                                             "error-drop",
 828                                             VNET_INTERFACE_OUTPUT_NEXT_DROP);
 829       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 830                                     hw->tx_node_index,
 831                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 832     }
 833
 834   setup_output_node (vm, hw->output_node_index, hw_class);
 835   setup_tx_node (vm, hw->tx_node_index, dev_class);
 836
 837   /* Call all up/down callbacks with zero flags when interface is created. */
 838   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 839                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 840   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 841                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 842
 843   return hw_index;
 844 }
 845
 846 void
 847 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 848 {
 849   vnet_interface_main_t *im = &vnm->interface_main;
 850   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 851   vlib_main_t *vm = vnm->vlib_main;
 852
 853   /* If it is up, mark it down. */
 854   if (hw->flags != 0)
 855     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 856
 857   /* Call delete callbacks. */
 858   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 859
 860   /* Delete software interface corresponding to hardware interface. */
 861   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 862
 863   /* Delete any sub-interfaces. */
 864   {
 865     u32 id, sw_if_index;
 866     /* *INDENT-OFF* */
 867     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id, ({
 868       vnet_delete_sw_interface (vnm, sw_if_index);
 869     }));
 870     /* *INDENT-ON* */
 871   }
 872
 873   {
 874     vnet_hw_interface_nodes_t *dn;
 875     vnet_interface_output_runtime_t *rt =
 876       vlib_node_get_runtime_data (vm, hw->output_node_index);
 877
 878     /* Mark node runtime as deleted so output node (if called) will drop packets. */
 879     rt->is_deleted = 1;
 880
 881     vlib_node_rename (vm, hw->output_node_index,
 882                       "interface-%d-output-deleted", hw_if_index);
 883     vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
 884                       hw_if_index);
 885     vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
 886     dn->tx_node_index = hw->tx_node_index;
 887     dn->output_node_index = hw->output_node_index;
 888   }
 889
 890   hash_unset_mem (im->hw_interface_by_name, hw->name);
 891   vec_free (hw->name);
 892
 893   pool_put (im->hw_interfaces, hw);
 894 }
 895
 896 static void
 897 serialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
 898 {
 899   u32 hw_if_index = va_arg (*va, u32);
 900   char *hw_class_name = va_arg (*va, char *);
 901   serialize_integer (m, hw_if_index, sizeof (hw_if_index));
 902   serialize_cstring (m, hw_class_name);
 903 }
 904
 905 static void
 906 unserialize_vnet_hw_interface_set_class (serialize_main_t * m, va_list * va)
 907 {
 908   CLIB_UNUSED (mc_main_t * mc) = va_arg (*va, mc_main_t *);
 909   vnet_main_t *vnm = vnet_get_main ();
 910   u32 hw_if_index;
 911   char *hw_class_name;
 912   uword *p;
 913   clib_error_t *error;
 914
 915   unserialize_integer (m, &hw_if_index, sizeof (hw_if_index));
 916   unserialize_cstring (m, &hw_class_name);
 917   p =
 918     hash_get (vnm->interface_main.hw_interface_class_by_name, hw_class_name);
 919   ASSERT (p != 0);
 920   error = vnet_hw_interface_set_class_helper (vnm, hw_if_index, p[0],
 921                                               /* redistribute */ 0);
 922   if (error)
 923     clib_error_report (error);
 924 }
 925
 926 MC_SERIALIZE_MSG (vnet_hw_interface_set_class_msg, static) =
 927 {
 928 .name = "vnet_hw_interface_set_class",.serialize =
 929     serialize_vnet_hw_interface_set_class,.unserialize =
 930     unserialize_vnet_hw_interface_set_class,};
 931
 932 void
 933 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
 934                                   u32 hw_class_index, u32 hw_instance)
 935 {
 936   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 937   vnet_hw_interface_class_t *hc =
 938     vnet_get_hw_interface_class (vnm, hw_class_index);
 939
 940   hi->hw_class_index = hw_class_index;
 941   hi->hw_instance = hw_instance;
 942   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
 943 }
 944
 945 static clib_error_t *
 946 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
 947                                     u32 hw_class_index, u32 redistribute)
 948 {
 949   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 950   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
 951   vnet_hw_interface_class_t *old_class =
 952     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 953   vnet_hw_interface_class_t *new_class =
 954     vnet_get_hw_interface_class (vnm, hw_class_index);
 955   vnet_device_class_t *dev_class =
 956     vnet_get_device_class (vnm, hi->dev_class_index);
 957   clib_error_t *error = 0;
 958
 959   /* New class equals old class?  Nothing to do. */
 960   if (hi->hw_class_index == hw_class_index)
 961     return 0;
 962
 963   /* No need (and incorrect since admin up flag may be set) to do error checking when
 964      receiving unserialize message. */
 965   if (redistribute)
 966     {
 967       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 968         return clib_error_return (0,
 969                                   "%v must be admin down to change class from %s to %s",
 970                                   hi->name, old_class->name, new_class->name);
 971
 972       /* Make sure interface supports given class. */
 973       if ((new_class->is_valid_class_for_interface
 974            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
 975                                                         hw_class_index))
 976           || (dev_class->is_valid_class_for_interface
 977               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
 978                                                            hw_class_index)))
 979         return clib_error_return (0,
 980                                   "%v class cannot be changed from %s to %s",
 981                                   hi->name, old_class->name, new_class->name);
 982
 983       if (vnm->vlib_main->mc_main)
 984         {
 985           mc_serialize (vnm->vlib_main->mc_main,
 986                         &vnet_hw_interface_set_class_msg, hw_if_index,
 987                         new_class->name);
 988           return 0;
 989         }
 990     }
 991
 992   if (old_class->hw_class_change)
 993     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
 994                                 new_class->index);
 995
 996   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
 997                                     /* instance */ ~0);
 998
 999   if (new_class->hw_class_change)
1000     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1001                                 new_class->index);
1002
1003   if (dev_class->hw_class_change)
1004     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1005
1006   return error;
1007 }
1008
1009 clib_error_t *
1010 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1011                              u32 hw_class_index)
1012 {
1013   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1014                                              /* redistribute */ 1);
1015 }
1016
1017 static int
1018 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1019                                               u32 hw_if_index,
1020                                               u32 node_index,
1021                                               u32 redistribute)
1022 {
1023   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1024   vnet_device_class_t *dev_class = vnet_get_device_class
1025     (vnm, hi->dev_class_index);
1026
1027   if (redistribute)
1028     {
1029       /* $$$$ fixme someday maybe */
1030       ASSERT (vnm->vlib_main->mc_main == 0);
1031     }
1032   if (dev_class->rx_redirect_to_node)
1033     {
1034       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1035       return 0;
1036     }
1037
1038   return VNET_API_ERROR_UNIMPLEMENTED;
1039 }
1040
1041 int
1042 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1043                                        u32 node_index)
1044 {
1045   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1046                                                        node_index,
1047                                                        1 /* redistribute */ );
1048 }
1049
1050 word
1051 vnet_sw_interface_compare (vnet_main_t * vnm,
1052                            uword sw_if_index0, uword sw_if_index1)
1053 {
1054   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1055   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1056   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1057   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1058
1059   if (h0 != h1)
1060     return vec_cmp (h0->name, h1->name);
1061   return (word) h0->hw_instance - (word) h1->hw_instance;
1062 }
1063
1064 word
1065 vnet_hw_interface_compare (vnet_main_t * vnm,
1066                            uword hw_if_index0, uword hw_if_index1)
1067 {
1068   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1069   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1070
1071   if (h0 != h1)
1072     return vec_cmp (h0->name, h1->name);
1073   return (word) h0->hw_instance - (word) h1->hw_instance;
1074 }
1075
1076 int
1077 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1078 {
1079   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1080   vnet_hw_interface_class_t *hc =
1081     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1082
1083   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1084 }
1085
1086 clib_error_t *
1087 vnet_interface_init (vlib_main_t * vm)
1088 {
1089   vnet_main_t *vnm = vnet_get_main ();
1090   vnet_interface_main_t *im = &vnm->interface_main;
1091   vlib_buffer_t *b = 0;
1092   vnet_buffer_opaque_t *o = 0;
1093
1094   /*
1095    * Keep people from shooting themselves in the foot.
1096    */
1097   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1098     {
1099 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1100       clib_warning                                                      \
1101         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1102          #a, sizeof(o->a), sizeof (o->unused));
1103       foreach_buffer_opaque_union_subtype;
1104 #undef _
1105
1106       return clib_error_return
1107         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1108          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1109     }
1110
1111   im->sw_if_counter_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1112                                                    CLIB_CACHE_LINE_BYTES);
1113   im->sw_if_counter_lock[0] = 1;        /* should be no need */
1114
1115   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1116   im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP].name = "drops";
1117   im->sw_if_counters[VNET_INTERFACE_COUNTER_PUNT].name = "punts";
1118   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP4].name = "ip4";
1119   im->sw_if_counters[VNET_INTERFACE_COUNTER_IP6].name = "ip6";
1120   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_NO_BUF].name = "rx-no-buf";
1121   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_MISS].name = "rx-miss";
1122   im->sw_if_counters[VNET_INTERFACE_COUNTER_RX_ERROR].name = "rx-error";
1123   im->sw_if_counters[VNET_INTERFACE_COUNTER_TX_ERROR].name = "tx-error";
1124
1125   vec_validate (im->combined_sw_if_counters,
1126                 VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1127   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX].name = "rx";
1128   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX].name = "tx";
1129
1130   im->sw_if_counter_lock[0] = 0;
1131
1132   im->device_class_by_name = hash_create_string ( /* size */ 0,
1133                                                  sizeof (uword));
1134   {
1135     vnet_device_class_t *c;
1136
1137     c = vnm->device_class_registrations;
1138
1139     while (c)
1140       {
1141         c->index = vec_len (im->device_classes);
1142         hash_set_mem (im->device_class_by_name, c->name, c->index);
1143         vec_add1 (im->device_classes, c[0]);
1144         c = c->next_class_registration;
1145       }
1146   }
1147
1148   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1149                                                        sizeof (uword));
1150
1151   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1152                                                     sizeof (uword));
1153   {
1154     vnet_hw_interface_class_t *c;
1155
1156     c = vnm->hw_interface_class_registrations;
1157
1158     while (c)
1159       {
1160         c->index = vec_len (im->hw_interface_classes);
1161         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1162
1163         if (NULL == c->build_rewrite)
1164           c->build_rewrite = default_build_rewrite;
1165         if (NULL == c->update_adjacency)
1166           c->update_adjacency = default_update_adjacency;
1167
1168         vec_add1 (im->hw_interface_classes, c[0]);
1169         c = c->next_class_registration;
1170       }
1171   }
1172
1173   {
1174     clib_error_t *error;
1175
1176     if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1177       return error;
1178
1179     return error;
1180   }
1181 }
1182
1183 VLIB_INIT_FUNCTION (vnet_interface_init);
1184
1185 /* Kludge to renumber interface names [only!] */
1186 int
1187 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1188 {
1189   int rv;
1190   vnet_main_t *vnm = vnet_get_main ();
1191   vnet_interface_main_t *im = &vnm->interface_main;
1192   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1193
1194   vnet_device_class_t *dev_class = vnet_get_device_class
1195     (vnm, hi->dev_class_index);
1196
1197   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1198     return VNET_API_ERROR_UNIMPLEMENTED;
1199
1200   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1201
1202   if (rv)
1203     return rv;
1204
1205   hash_unset_mem (im->hw_interface_by_name, hi->name);
1206   vec_free (hi->name);
1207   /* Use the mapping we set up to call it Ishmael */
1208   hi->name = format (0, "%U", dev_class->format_device_name,
1209                      hi->dev_instance);
1210
1211   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1212   return rv;
1213 }
1214
1215 int
1216 vnet_interface_add_del_feature (vnet_main_t * vnm,
1217                                 vlib_main_t * vm,
1218                                 u32 sw_if_index,
1219                                 intf_output_feat_t feature, int is_add)
1220 {
1221   vnet_sw_interface_t *sw;
1222
1223   sw = vnet_get_sw_interface (vnm, sw_if_index);
1224
1225   if (is_add)
1226     {
1227
1228       sw->output_feature_bitmap |= (1 << feature);
1229       sw->output_feature_bitmap |= (1 << INTF_OUTPUT_FEAT_DONE);
1230
1231     }
1232   else
1233     {                           /* delete */
1234
1235       sw->output_feature_bitmap &= ~(1 << feature);
1236       if (sw->output_feature_bitmap == (1 << INTF_OUTPUT_FEAT_DONE))
1237         sw->output_feature_bitmap = 0;
1238
1239     }
1240   return 0;
1241 }
1242
1243 clib_error_t *
1244 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1245 {
1246   vnet_interface_main_t *im = &vnm->interface_main;
1247   vlib_main_t *vm = vnm->vlib_main;
1248   vnet_hw_interface_t *hw;
1249   u8 *old_name;
1250   clib_error_t *error = 0;
1251
1252   hw = vnet_get_hw_interface (vnm, hw_if_index);
1253   if (!hw)
1254     {
1255       return clib_error_return (0,
1256                                 "unable to find hw interface for index %u",
1257                                 hw_if_index);
1258     }
1259
1260   old_name = hw->name;
1261
1262   /* set new hw->name */
1263   hw->name = format (0, "%s", new_name);
1264
1265   /* remove the old name to hw_if_index mapping and install the new one */
1266   hash_unset_mem (im->hw_interface_by_name, old_name);
1267   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1268
1269   /* rename tx/output nodes */
1270   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1271   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1272
1273   /* free the old name vector */
1274   vec_free (old_name);
1275
1276   return error;
1277 }
1278
1279 static clib_error_t *
1280 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1281                                              u32 hw_if_index, u64 mac_address)
1282 {
1283   clib_error_t *error = 0;
1284   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1285
1286   if (hi->hw_address)
1287     {
1288       vnet_device_class_t *dev_class =
1289         vnet_get_device_class (vnm, hi->dev_class_index);
1290       if (dev_class->mac_addr_change_function)
1291         {
1292           error =
1293             dev_class->mac_addr_change_function (vnet_get_hw_interface
1294                                                  (vnm, hw_if_index),
1295                                                  (char *) &mac_address);
1296         }
1297       if (!error)
1298         {
1299           ethernet_main_t *em = &ethernet_main;
1300           ethernet_interface_t *ei =
1301             pool_elt_at_index (em->interfaces, hi->hw_instance);
1302
1303           vec_validate (hi->hw_address,
1304                         STRUCT_SIZE_OF (ethernet_header_t, src_address) - 1);
1305           clib_memcpy (hi->hw_address, &mac_address,
1306                        vec_len (hi->hw_address));
1307
1308           clib_memcpy (ei->address, (u8 *) & mac_address,
1309                        sizeof (ei->address));
1310           ethernet_arp_change_mac (vnm, hw_if_index);
1311           ethernet_ndp_change_mac (vnm->vlib_main, hw_if_index);
1312         }
1313       else
1314         {
1315           error =
1316             clib_error_return (0,
1317                                "MAC Address Change is not supported on this interface");
1318         }
1319     }
1320   else
1321     {
1322       error =
1323         clib_error_return (0,
1324                            "mac address change is not supported for interface index %u",
1325                            hw_if_index);
1326     }
1327   return error;
1328 }
1329
1330 clib_error_t *
1331 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1332                                       u64 mac_address)
1333 {
1334   return vnet_hw_interface_change_mac_address_helper
1335     (vnm, hw_if_index, mac_address);
1336 }
1337
1338 vnet_l3_packet_type_t
1339 vnet_link_to_l3_proto (vnet_link_t link)
1340 {
1341   switch (link)
1342     {
1343     case VNET_LINK_IP4:
1344       return (VNET_L3_PACKET_TYPE_IP4);
1345     case VNET_LINK_IP6:
1346       return (VNET_L3_PACKET_TYPE_IP6);
1347     case VNET_LINK_MPLS:
1348       return (VNET_L3_PACKET_TYPE_MPLS_UNICAST);
1349     case VNET_LINK_ARP:
1350       return (VNET_L3_PACKET_TYPE_ARP);
1351     case VNET_LINK_ETHERNET:
1352       ASSERT (0);
1353       break;
1354     }
1355   ASSERT (0);
1356   return (0);
1357 }
1358
1359 u8 *
1360 default_build_rewrite (vnet_main_t * vnm,
1361                        u32 sw_if_index,
1362                        vnet_link_t link_type, const void *dst_address)
1363 {
1364   return (NULL);
1365 }
1366
1367 void
1368 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1369 {
1370   u8 *rewrite;
1371
1372   rewrite = vnet_build_rewrite_for_sw_interface (vnm, sw_if_index,
1373                                                  adj_get_link_type (ai),
1374                                                  NULL);
1375
1376   adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE, rewrite);
1377 }
1378
1379
1380 /*
1381  * fd.io coding-style-patch-verification: ON
1382  *
1383  * Local Variables:
1384  * eval: (c-set-style "gnu")
1385  * End:
1386  */